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HomeMy WebLinkAboutItem No 1011/29/2021 1 Ocean Outfall Condition  Assessment and Scoping Study Presented by: Valerie Ratto Senior Engineer Operations  Committee December 1, 2021 2 Overview of Outfall Offshore Pipeline 5 Miles Long 120‐Inch Diameter Emergency Outfall 1.5 Miles Long 78‐Inch Diameter OC SAN 1 2 11/29/2021 2 3 Project Elements Scoping  Study Spring 2022 Port  Cleaning  and Clearing Condition  Assessment 3D Scanning  and  Modeling Impacts of  Low Flows 4 Project Elements Scoping  Study Spring 2022 Port  Cleaning  and Clearing Condition  Assessment 3D Scanning  and  Modeling Impacts of  Low Flows 3 4 11/29/2021 3 Barnacle Cleaning 5 •Full Video: https://web.microsoftstream.com/video/7a9d8402-8e45-4981-ab5f-66dbd423f68c Barnacle Cleaning Clip 6 5 6 11/29/2021 4 •Immediate Repairs • Replace Tie-Rod • Repair Concrete Cracks • Repair Flap Gate Crack Preliminary Findings 7 Manhole Cover Condition  8 7 8 11/29/2021 5 Cover Removal and Replacement 9 Item Change Value Immediate Repairs $671,882 Oil Spill Remobilization $155,503* Total $827,385 Additional Consultant Costs 10 *OC San to work with Legal Counsel to seek reimbursement from the responsible party 9 10 11/29/2021 6 Contract Contingency Total Original Design Contract $2,744,000 $274,400 (10%) $3,018,400 Contingency Increase Request $823,200 (30%) $823,200 $1,097,600 (40%) $3,841,600 Consultant Contract 11 Recommend to the Board of Directors to: Approve a contingency increase of $823,200 (30%) to the Professional Services Agreement with Carollo Engineers, Inc. for Ocean Outfall Condition Assessment and ScopingStudy, Project No. PS18-09, for a total contingency of $1,097,600 (40%). Recommendation 12 11 12 11/29/2021 7 Questions ? 13 13